The caprices of the great are among the unsolved mysteries of life.

Their origin is one of the great unsolved mysteries in modem historical research.

But, despite her fame, Cleopatra's tomb is one of the great unsolved mysteries.

His death is one of the many unsolved mysteries of London.

But let me tell you here and now, I don't like unsolved mysteries.

The developing human brain remains one of the few unsolved mysteries of science.

It was one of the unsolved mysteries a hacker often faced-anunpleasant side of hacking.

But like all unsolved mysteries, we may never know.

There have been unsolved mysteries, but no man may say when a crime is unsolvable.

It is these unsolved mysteries which make it a living subject, constantly evolving, changing and surprising.

But he was always conscious of the swiftly passing days, and the unsolved mysteries around them.

To this day, his identity remains one of the great, unsolved mysteries in the history of crime.

Mr. Ludwig appears to be one of those unsolved mysteries which go to make up an imperfect world.

Another one of life's unsolved mysteries.

The molecular mechanisms of organ size control and regulation remain one of the major unsolved mysteries of development biology.

I can't stand unsolved mysteries.